The Logging Truck is one of my favorits. I never came to buy it. Now I have enough technic Lego to build it anyway. However I don't have the Technic Linear Actuator Mini 92693c01. That is why I tried to replace it with pneumatic version. This worked out fine.

The power exit of the Mini Actuator I used to power the pump. The room for the drive train I used to lead the tubes to the pneumatic cylinder.

Here I placed the pneumatic switch to switch between directions. Just added a lift arme dark grey 7 long to place the switch.